<template>
  <div class="tags" v-if="showTags">
    <ul>
      <li class="tags-li" v-for="(item,index) in tagsList" :class="{'active': isActive(item.path)}" :key="index">
        <router-link :to="item.path" class="tags-li-title">{{item.title}}</router-link>
        <span class="tags-li-icon" @click="closeTags(index)">
          <i class="el-icon-close"></i>
        </span>
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  computed: {
    tagsList () {
      return this.$store.state.tagsList
    },
    showTags () {
      return this.tagsList.length > 0
    },
    collapse () {
      return this.$store.state.collapse
    }
  },
  watch: {
    $route (newValue) {
      this.setTags(newValue)
    }
  },
  created () {
    this.setTags(this.$route)
    // 关闭当前页面的标签页
    // this.$store.commit("closeCurrentTag", {
    //     $router: this.$router,
    //     $route: this.$route
    // });
  },
  methods: {
    // 侧边栏折叠
    collapseChage () {
      this.$store.commit('hadndleCollapse', !this.collapse)
    },
    isActive (path) {
      return path === this.$route.fullPath
    },
    // 关闭单个标签
    closeTags (index) {
      const delItem = this.tagsList[index]
      this.$store.commit('delTagsItem', {
        index
      })
      const item = this.tagsList[index]
        ? this.tagsList[index]
        : this.tagsList[index - 1]
      if (item) {
        delItem.path === this.$route.fullPath && this.$router.push(item.path)
      } else {
        this.$router.push('/')
      }
    },
    // 关闭全部标签
    closeAll () {
      this.$store.commit('clearTags')
      this.$router.push('/')
    },
    // 关闭其他标签
    closeOther () {
      const curItem = this.tagsList.filter((item) => {
        return item.path === this.$route.fullPath
      })
      this.$store.commit('closeTagsOther', curItem)
    },
    // 设置标签
    setTags (route) {
      const isExist = this.tagsList.some((item) => {
        return item.path === route.fullPath
      })
      // 如果是没有打开过的标签，新增
      if (!isExist) {
        if (this.tagsList.length >= 8) {
          this.$store.commit('delTagsItem', {
            index: 0
          })
        }
        this.$store.commit('setTagsItem', {
          name: route.name,
          title: route.meta.title,
          path: route.fullPath
        })
      }
    },
    handleTags (command) {
      command === 'other' ? this.closeOther() : this.closeAll()
    }
  }

  // mounted() {
  //     if (document.body.clientWidth < 1500) {
  //         this.collapseChage();
  //     }
  // }
}
</script>

<style lang="less" scoped>
  .collapse-btn:hover {
    background: #409eff;
  }
  .tags {
    position: relative;
    height: 30px;
    overflow: hidden;
    background: #fff;
    padding-right: 120px;
    box-shadow: 0 5px 10px #ddd;
  }
  .collapse-btn {
    float: left;
    padding: 0 21px;
    cursor: pointer;
    line-height: 32px;
  }
  .tags ul {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
  }
  .tags-li {
    float: left;
    margin: 3px 5px 2px 3px;
    border-radius: 3px;
    font-size: 12px;
    overflow: hidden;
    cursor: pointer;
    height: 23px;
    line-height: 23px;
    border: 1px solid #e9eaec;
    background: #fff;
    padding: 0 5px 0 12px;
    vertical-align: middle;
    color: #666;
    -webkit-transition: all 0.3s ease-in;
    -moz-transition: all 0.3s ease-in;
    transition: all 0.3s ease-in;
  }

  .tags-li:not(.active):hover {
    background: #f8f8f8;
  }

  .tags-li.active {
    color: #fff;
  }

  .tags-li.active {
    border: 1px solid #409eff;
    background-color: #409eff;
  }

  .tags-li-title {
    float: left;
    max-width: 80px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    margin-right: 5px;
    color: #666;
  }

  .tags-li.active .tags-li-title {
    color: #fff;
  }

  .tags-close-box {
    position: absolute;
    right: 0;
    top: 0;
    box-sizing: border-box;
    padding-top: 1px;
    text-align: center;
    width: 110px;
    height: 30px;
    background: #fff;
    box-shadow: -3px 0 15px 3px rgba(0, 0, 0, 0.1);
    z-index: 10;
  }
</style>
